Abutment screw with spring-washer

Details Abutment screw with spring-washer Abutment screw with spring-washer

2007-11-27

2007-11-27

Bumgarner, Melba (Department: 3732)

Dentistry

Prosthodontics

Holding or positioning denture in mouth

Reexamination Certificate

active

11194254

ABSTRACT:
A dental retaining screw used to secure dental components, such as abutments, copings, and prosthesis to dental implants. The screw has a body formed from titanium and a spring-washer formed from gold. The spring-washer is adapted to prevent the screw from loosening or losing preload once tightened to the implant. The spring-washer includes an annular body with a plurality of flexible legs extending from the annular body; the legs prevent the screw from coming loose during shipping or while attached to an abutment.

REFERENCES:
patent: 4462730 (1984-07-01), Knohl
patent: 5695335 (1997-12-01), Haas et al.
patent: 5711669 (1998-01-01), Hurson
patent: 5733122 (1998-03-01), Gordon
patent: 6168436 (2001-01-01), O'Brien
patent: 6447295 (2002-09-01), Kumar et al.
patent: 6932606 (2005-08-01), Aravena et al.

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